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Value-for-money

Buddleia davidii Black Knight - Butterfly Bush

Buddleja x davidii Black knight
Butterfly Bush, Summer Lilac

26 reviews
4,8/5
22 reviews
2 reviews
1 reviews
1 reviews
0 reviews

Small plant but sturdy roots. It's already thriving since its arrival.

Aurore94, 25/02/2024

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This plant carries a 24 months recovery warranty

More information

Value-for-money
Hardy butterfly tree, 3m (9.8 ft) tall, with summer flowering in very long spikes of dark purple, fragrant flowers, on beautiful silver-green foliage.
Flower size
30 cm
Height at maturity
3 m
Spread at maturity
2 m
Exposure
Sun
Hardiness
Hardy down to -29°C
Soil moisture
Dry soil, Moist soil
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Recommended planting time February to May, September to December
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Flowering time July to September
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Description

Buddleia davidii 'Black Knight' is a bush with dark purple, honey-scented flowers in long spikes and silver-green leaves.

                                                               

This hardy bush has a significant advantage: its melliferous flowering! It is not for nothing that it is called the Butterfly Bush. With an elegant habit, Buddleia davidii 'Black Knight' develops deciduous, opposite, elongated leaves, 30cm (11.8 in) long, green on the upper surface and white on the lower surface, on arching branches. From August to September, it bears compact, upright, fragrant flowers in dark purple, 30cm (11.8 in) long, whose pleasant scent attracts many butterflies.

Buddleia davidii 'Black Knight' prefers well-drained soil and a sunny, sheltered location. Deadhead the flowers as they fade to limit its spread and prune severely from March to April.

Buddleia davidii 'Black Knight' can be used as a standalone plant or in a mass planting of bushes, such as white or yellow potentillas.

Plant habit

Height at maturity 3 m
Spread at maturity 2 m
Habit Irregular, bushy
Growth rate fast

Flowering

Flower colour violet
Flowering time July to September
Flower size 30 cm
Fragrance slightly scented
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour green

Botanical data

Genus

Buddleja

Species

x davidii

Cultivar

Black knight

Family

Buddlejaceae

Other common names

Butterfly Bush, Summer Lilac

Origin

Cultivar or hybrid

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Planting and care

Buddleia davidii 'Black Knight' is best planted in autumn in a well-drained soil in full sun. It may be susceptible to aphid infestations.

Planting period

Recommended planting time February to May, September to December

Intended location

Type of use Border, Free-standing, Container, Hedge
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Planting density 1 per m2
Exposure Sun
Soil pH Any
Soil type Chalky (poor, alkaline and well-drained), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Well-drained soil

Care

Pruning instructions The bush only requires a single pruning after flowering. However, every 2 to 3 years, it is good to cut back the branches to maintain a compact habit and prevent the bush from "opening up". In late winter, around March or April, remove half or even two-thirds of the branches and cut off all dead wood. Buddleias flower on new growth, so you won't risk removing the upcoming flowers.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Dry soil, Moist soil
Overwinter Can be left in the ground
4,8/5

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